Blake Purely Packaging 440 x 170 mm Peel & Seal All Board Envelopes (PPA24 RS) White Pack of 100

Amazon

Make a difference to your mail with these stiff and protective Blake Purely Packaging All Board envelopes by Blake Made from heavyweight 350gsm card to ensure that your mail is protected Strong Peel & Seal closure for ease of use, additional security and longer shelf life Tamper evident Rip Strip for easy opening

Zoro Tools

Making the unpostable... postable. Allboard envelopes available in sizes C5 to C2, made using an attractive white lined board, ensuring the most unyielding postable item can now be sent with ease.